The Salomon GRVL Skin 4 is a lightweight, body-hugging hydration vest designed for gravel running, road miles, and fast training sessions where freedom of movement matters. With a streamlined 4-litre capacity, breathable stretch construction, and Salomon’s trusted SensiFit™ fit system, it delivers stable hydration carry without bounce or distraction. Ideal for runners who want just enough storage and nothing they don’t.